+--- postfix-3.6.7/makedefs~ 2022-10-12 09:49:27.868418757 +0000
++++ postfix-3.6.7/makedefs 2022-10-12 09:52:37.623569121 +0000
+@@ -568,7 +568,7 @@
+ : ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
+ : ${PLUGIN_LD="${CC-gcc} -shared"}
+ ;;
+- Linux.[345].*) SYSTYPE=LINUX$RELEASE_MAJOR
++ Linux.[3456].*) SYSTYPE=LINUX$RELEASE_MAJOR
+ case "$CCARGS" in
+ *-DNO_DB*) ;;
+ *-DHAS_DB*) ;;
+--- postfix-3.6.7/src/util/sys_defs.h~ 2022-10-12 09:55:12.582892346 +0000
++++ postfix-3.6.7/src/util/sys_defs.h 2022-10-12 10:09:31.063700522 +0000
+@@ -749,7 +749,7 @@
+ /*
+ * LINUX.
+ */
+-#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5)
++#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5) || defined(LINUX6)
+ #define SUPPORTED
+ #define UINT32_TYPE unsigned int
+ #define UINT16_TYPE unsigned short